gls_poly_line.h

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/*! \file
  \brief  The disti::GlsPolyLine class.

  \par Copyright Information

  Copyright (c) 2016 by The DiSTI Corporation.<br>
  11301 Corporate Blvd; Suite 100<br>
  Orlando, Florida 32817<br>
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  <br>
  All rights reserved.<br>

  This Software contains proprietary trade secrets of DiSTI and may not be
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Derivative Works based on this or other copyrighted DiSTI Software.

  NO WARRANTY. THE SOFTWARE IS PROVIDED "AS-IS," WITHOUT WARRANTY OF ANY KIND,
AND ANY USE OF THIS SOFTWARE PRODUCT IS AT YOUR OWN RISK. TO THE MAXIMUM EXTENT
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AND CONDITIONS, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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  LIMITATION OF LIABILITY. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW,
IN NO EVENT SHALL DISTI OR ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
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*/
#ifndef _GLSPOLYLINE_H
#define _GLSPOLYLINE_H
#include "dynamic_array.h"
#include "glpolygon.h"
#include "gltrimesh.h"
#include "gls_cpp_lang_support.h"

#ifdef GLES
#include "gls_vertex_array.h"
#endif

//////////////////// Provides support for creating DLLs ////////////////////////
#if (defined(GLSGEN_EXPORT_GLSPOLYLINE) || \
     defined(GLSGEN_IMPORT_GLSPOLYLINE) || \
     defined(GLS_EXPORT_GENERATED) || \
     defined(GLS_IMPORT_GENERATED)) \
     && defined(_MSC_VER) 
#  if defined(GLSGEN_EXPORT_GLSPOLYLINE) || defined(GLS_EXPORT_GENERATED)
#    define GLSGEN_GLSPOLYLINE_EXPORT   __declspec(dllexport)
#  else
#    define GLSGEN_GLSPOLYLINE_EXPORT   __declspec(dllimport)
#  endif
#else
#  define GLSGEN_GLSPOLYLINE_EXPORT
#endif
///////////////////////////////////////////////////////////////////////////////

#define LIB_BASE_NAME "gls_poly_line"
#include "gls_auto_lib.h"
#undef LIB_BASE_NAME

namespace disti
{

// SetValue enumerations
enum {
    GLS_POLY_LINE_FIRST_VALUE = GLS_LAST_INITIALIZER+1,
    GLS_POLY_LINE_THICKNESS,
    GLS_POLY_LINE_HALO,
    GLS_POLY_LINE_HALO_COLOR,
    GLS_POLY_LINE_HALO_THICKNESS,
    GLS_POLY_LINE_NORMAL,
    GLS_POLY_LINE_LAST_INITIALIZER = GLS_POLY_LINE_NORMAL
};

typedef struct
{ 
    Vector    vertex;    /**< The vertex coordinate */
    Vector    texCoord;  /**< The texture coordinate */
    Vector    normal;    /**< The vertex normal */
} GlsPolyLineVertex;

typedef struct
{
    GlsPolyLineVertex a,b,c;
} GlsPolyLineFace;

/** Runtime implementation of a GlsPolyLine */
class GlsPolyLine : public GLPolygon
{
    friend class GlsPolyLineEditor;
private:
    GlsPolyLine& operator=( const GlsPolyLine& ) DISTI_SPECIAL_MEM_FUN_DELETE;
    GlsPolyLine( const GlsPolyLine& ) DISTI_SPECIAL_MEM_FUN_DELETE;

public:   
    typedef GLPolygon _BaseClass;
    typedef DynamicArray<GlsPolyLineFace> GlsPolyLineTriangleList;

    /** Create a new GlsPolyLine.*/
    GLSGEN_GLSPOLYLINE_EXPORT GlsPolyLine();

    GLSGEN_GLSPOLYLINE_EXPORT GlsPolyLine( const GlsPolyLine& that, const bool generateNames );

    /** Destructs a GlsPolyLine object */
    virtual GLSGEN_GLSPOLYLINE_EXPORT ~GlsPolyLine();

    static GLSGEN_GLSPOLYLINE_EXPORT DisplayObject* CreateInstance();

    virtual GLSGEN_GLSPOLYLINE_EXPORT DisplayObject* CloneObject(bool generateNames = false);

    virtual GLSGEN_GLSPOLYLINE_EXPORT void GetExtents(float &minx,float &miny,float &minz, float &maxx,float &maxy,float &maxz);

    using _BaseClass::SetColor;
    virtual GLSGEN_GLSPOLYLINE_EXPORT void SetColor(const glsColor& color);

    using _BaseClass::SetFillColor;
    virtual GLSGEN_GLSPOLYLINE_EXPORT void SetFillColor(const glsColor& color);

    virtual GLSGEN_GLSPOLYLINE_EXPORT void CopyProperties(DisplayObject *src);
    virtual GLSGEN_GLSPOLYLINE_EXPORT void CopyGeometry(DisplayObject *srcArg);

    virtual GLSGEN_GLSPOLYLINE_EXPORT InterfaceListType* GetCppInterfaceDescription(InterfaceListType* addToThisList= NULL );
    virtual GLSGEN_GLSPOLYLINE_EXPORT void GetCppInterfaceDescriptionFree(InterfaceListType* array);

    virtual GLSGEN_GLSPOLYLINE_EXPORT void PreDraw( const OpenGLMatrices& parentMatrices,Culler &culler );
    virtual GLSGEN_GLSPOLYLINE_EXPORT void Draw(void);

    /* Unhides base class implementation. */
    using _BaseClass::Scale;

    virtual GLSGEN_GLSPOLYLINE_EXPORT void Scale(float px, float py, float pz, Vertex *anchor, int handleBar);

    /* Unhides base class implementation. */
    using _BaseClass::Rotate;

    virtual GLSGEN_GLSPOLYLINE_EXPORT void Rotate(const Vector &orig,float angle,const Vector &axis);
    
    virtual GLSGEN_GLSPOLYLINE_EXPORT bool Hit(float x,float y,float z,float scale, const Vector& directionVector,Vector *collisionPoint);

    virtual GLSGEN_GLSPOLYLINE_EXPORT void SetValue(int spec,va_list &args);

    virtual GLSGEN_GLSPOLYLINE_EXPORT void SetAvailableAttributes(unsigned int value);

    /* Unhides base class implementation. */
    using _BaseClass::PolygonEnd;

    /** Sets the polygon end mode (Open or Closed) for the polygon
      * \param end  Enumeration indicating open or closed mode
      * \sa PolygonClose_e
      */
    virtual GLSGEN_GLSPOLYLINE_EXPORT void PolygonEnd(const int end);

    //////////////////////////////////////////////////
    // GlsPolyLine specific operations
    //////////////////////////////////////////////////

    /** Sets the line thickness
      * \param val  The new line thickness in logical units
      */
    GLSGEN_GLSPOLYLINE_EXPORT void Thickness(const float &val);

    /** Gets the line thickness
      * \return The line thickness in logical units
      */
    GLSGEN_GLSPOLYLINE_EXPORT float Thickness(void) { return _thickness; }

    /** Get the normal for the polyline **/
    GLSGEN_GLSPOLYLINE_EXPORT Vector GlobalNormal(void) { return _normal; }

    /** Enable/Disable halo */
    GLSGEN_GLSPOLYLINE_EXPORT void Halo(const bool &val);

    /** Get the halo setting */
    GLSGEN_GLSPOLYLINE_EXPORT bool Halo(void) { return _halo; }

    /** Set the halo color */
    GLSGEN_GLSPOLYLINE_EXPORT void HaloColor(const glsColor &val);

    /** Get the halo color */
    GLSGEN_GLSPOLYLINE_EXPORT glsColor HaloColor(void) { return _haloColor; }
    
    /** Set the halo thickness 
      * \param val  The new halo thickness in logical units
      */
    GLSGEN_GLSPOLYLINE_EXPORT void HaloThickness(const float &val);

    /** Get the halo thickness
      * \return The line thickness in logical units
      */
    GLSGEN_GLSPOLYLINE_EXPORT float HaloThickness(void) { return _haloThickness; _needsRecalculate = true; }


    /** Sets the vertex data for this polygon
      * You should call UpdateBoundingVolume after changing an objects extents.
      * \sa UpdateBoundingVolume
      * \param nPoints  The number of vertices in the object
      * \param vertices  The vertex data for the object
      */
    virtual GLSGEN_GLSPOLYLINE_EXPORT void SetVertices(unsigned int nPoints,Vertex *vertices);

    /** see base class */
    virtual GLSGEN_GLSPOLYLINE_EXPORT void DeleteVertex(unsigned int index);

    /** Set the recalculate flag for the object to force it to recalculate
     */
    virtual GLSGEN_GLSPOLYLINE_EXPORT void SetRecalculate(void);

protected:
#ifdef GLES
    // These are helper functions, only used for GLES, and should not be considered missing external api
    void SetFromGloData( GlsGloFileAttribute& data );
    void BakeVBO( GlsVertexArray &vbo, GlsPolyLineTriangleList& vertices, glsColor color );
    GlsVertexArray _gles_triangles;
    GlsVertexArray _gles_haloTriangles;
#endif

    GlsPolyLineTriangleList       _triangles;
    float                         _thickness;
    Vector                        _normal;

    bool                          _halo;
    glsColor                      _haloColor;
    float                         _haloThickness;
    GlsPolyLineTriangleList       _haloTriangles;

    bool                          _needsRecalculate;

    unsigned int                  _endCapIndex;

    /** updates the end-cap hang over for the halos */
    void UpdateHaloEndCaps();

    /** notify that vertices have changed
      * updates bounding volume and sets recalculate for polyline
      */
    void VerticesChanged( void );

    /** Computes the geometry for the line segments and invokes the appropriate corner method */
    void ComputeSegments(void);
    /** ComputeSegments helper method */
    void ComputeSegments(GlsPolyLineTriangleList &array, float thickness, bool calculatingHalos = false);
    /** Compute a corner */
    void ComputeCorner(GlsPolyLineTriangleList &array, float thickness, float cornerRadius, const Vector &refVert,const Vector &v1,const Vector &v2,const Vector &v3,const Vector &v4,const Vector &l1,const Vector &l2, bool calculatingHalos = false);    


    void DrawTriangles(GlsPolyLineTriangleList &array);
};


} // namespace disti

#endif